Mat-cutter.



'Patented :une lo, |902...

c. ARNOLD..

MAT GUTTER.

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(Application led Nov. 4, 19071.)

(No Model.)

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UNITED `STATES PATENT OFFICE.

MACDONALD, or

CHICAGO, ILLINOIS.

MAT-CUTTER.

SPECIFICATION forming part of Letters Patent No. 701,828, dated June 10, 1902.

Application led November 4, 19

T0 ctll'wwm it may concern:

Be it known that I, CARLESARNOLD, a citizen of the United` States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new andv useful Improvements in Mat-Cutters,.of which-the following is a specifi-cation. Y Y

This invention relates to cutters'used for general purposes, but more yparticularly for cutting out mats for pictures and the like. Its objects are to provide a device of this character which will cut out various forms, such as ovals and circles, which will be economical in construction, and which `will be easilyope'i-i ated to do efficient Work. It comprises the mechanism and various details which will be fully described hereinafterpand illustrated in the accompanying drawings, in which- Figure l is a top plan View of va-device embodying this invention shown in operative position. Fig. 2 is a sectional elevation4 of the same. Fig. 3 is a bottom plan View of the traveling plate. Fig. is a similar view showing a modified form of the same. Fig. 5 is a modiiied form of knife-holder. Fig. 6 is a detail of the circle-cutting attachment.

A represents aguide-plate of any suitable material, in which are formed the oval grooves a o.' a2, which-may be, as shown, of dissimilar outline and of any desirable size. It is found convenient in practice to have a num@ ber of such plates of varying sizes to admit cutting a large variety of ovals with the same cutting mechanism. Lines a a4 are marked.

across the top of the plate to indicate the long and short axis of. the ovals for convenience in locating the same onthe board to be cut. Holdingepoints h b are provided for securing the plate upon the buoard'and are made adj ustable by being threaded into tapped holes b' b in the plate A.

C is a traveler-plate carrying the cutterarm D. This plate rests upon the surface of the plate A and is. guided in its movement thereon by two depending rollers c c, adapted to engage one of the grooves a a', &c., and is so governed by them in its movement that the cutter-arm is always in a position substantially normal to the curve. Although preferable, these rollers may be dispensed with and a cam c' substituted, as shown in 0l. SerialNmBliOSQ. (No model.)

Fig; 4. The cutter-arm D is shown as being formed of a bent wire or rod and is adjust- Aably secured to the plate C by a set-screw d and a guide-screw d, bearing a knob or handle cl2. At one extremity of the arm D is the knife-bearing block E, slotted at e to receive the knife F, which is securely held by a setscrew e in the plate e2, which is attached to the block by screws e?. rIhe slot is shown as being beveled in order to give the desired bevel to the cut-out inthe mat; but I have shown in Fig. 5 a means for securing the knife in a vertical position and using the -same block. A second knob or handle G is -`attached to the block E to operate vand control the movement of the knife.

'The attachment shown in Fig. 6 for cutting circles consists of the plate H, which is provided With the usual points forsecuring it on the mat and furnishes a pivot-bearing for the disk h, bearing the'- set-screw h', which is adapted to engage with the cutter-arm D, as shown.

The invention is operated by securing the guide-plate in position upon the mat or board I, as shown in Fig. 2, with the traveler-plate engaging the desired oval groove and the cutter-arm adjusted for the size of o val required. The knife being set, the handlesd2 and Gr are firmly grasped andV the cutter-armv swung around thereby, always normal to the curve ofV the guide-oval, the knife meanwhile cutting out the desired oval in the mat. When circles are to be cut, the cutter-arm is detached from the traveler-plate and is secured to the pivot member shownin Fig. 6, when by simply revolving the knife the circle will be cut out of the mat.

It is readily'seen that this invention may be applied for avariety of uses--as, for instance, cutting glass, in which case a glasscutter is substituted for the knife-and it may also be varied in the details of construction Without departing fromthe spirit thereof, which I donot wish to'limit tothe exact form shown; but

What I claim, and desire to secure by Letters Patent, is-

1. In combination, the guide-plate provided with oval grooves, atraveler-plate means for causing said plate to move in conformity with IOO said oval grooves and an arm rgidlyseeured to said traveler-plate.

2. A guide plate provided with guidegrooves therein, :t traveler-plete, rollers on said latter plate to engage said grooves, an arm rigidly and adjustably secured to seid traveler-plate and carrying a cutter.

A guide-plate provided with grooves adjustable holding-points, a traveler-plate provided with rollers or equivalent means adapted to engage with said grooves, :in nrm :td-

CHARLES ARNOLD.

\Vi tnesses:

J. E. MACDONALD, ROSCOE A. JOHNSON. 

